Dr. Ryan James Hallmark, D.C.
Dr. Ryan James Hallmark is a Chiropractor provider (Chiropractor) practicing in Pleasant Hill, CA, registered in the NPPES registry with NPI 1548495567 since 2009. The credential DC stands for Doctor of Chiropractic.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1548495567 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Ryan James Hallmark |
| Credential | D.C. |
| Sex | Male |
| Practice address | Pleasant Hill, CA, 94523 |
| Phone | 9253501667 |
| Enumeration date | 2009-05-19 |
| Last updated in NPPES | 2024-12-21 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 25449 | CA |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 25449 | Other | CA | STATE BOARD |
Copy-ready billing details
Provider: Ryan Hallmark, D.C. NPI: 1548495567 Taxonomy: 111N00000X (Chiropractor) Address: Pleasant Hill, CA, 94523
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1346410982 | John Erdmann | Individual | Neurology Chiropractor | Pleasant Hill, CA |
Verify this record
Cross-check NPI 1548495567 against the authoritative CMS record: view Dr. Ryan James Hallmark on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-12-21.